Method to get all env variables

[Tim Kelty]

My use case is I want to get an array of all env vars that start with PHP_INI_, and loop through them with ini_set.

If I could get an array of all env vars, that would help.

[Tim Kelty]

Or in this case, should I just use $_ENV?

[João Paulo Cercal]

Hello @timkelty, I think that this code will help you.

<?php

class FakeClass
{
    public function getEnvironmentVariables()
    {
        return array_merge($_ENV, $_SERVER);
    }

    public function getEnvVarsThatBeginsWith($envKey)
    {
        $callback = function($key) use ($envKey) {
            return stripos($key, $envKey) === 0;
        };

        return array_filter($this->getEnvironmentVariables(), $callback, ARRAY_FILTER_USE_KEY);
    }
}

$envvar = new FakeClass();

print_r($envvar->getEnvVarsThatBeginsWith('PHP'));

I'm thinking if this solution can be interesting for other developers and if true, I will create a pull request and a new release of this library.

[Tim Kelty]

Yep, that's basically what I'm doing!

It think it would be nice/more flexible if the param was a regex.

Then you could just do something like:
print_r($envvar->getEnvironmentVariablesRegEx('/^PHP_/'));

[Tim Kelty]

Something like this:
Allows you do pass a filter of arrays of keys, or a string regex:

public function getAll($filter = null, $defaultValue = null)
{
  $all = $this->getEnvironmentVariables();
  $vars = array_filter($all, function($varName) use($all, $filter) {
    if (is_array($filter)) {
      return in_array($varName, $all);
    } elseif (is_string($filter)) {
      return preg_match($filter, $varName);
    }

    return true;
  });

  $vars = array_map(function($rawValue) use($defaultValue) {
    if ($rawValue === null) {
        return $defaultValue;
    }

    return (new Resource($rawValue))->process();
  }, $vars);

  return $vars;
}

[João Paulo Cercal]

Other solution that you can use is create only one environment variable that contains all configurations that you need.

<?php

require 'vendor/autoload.php';

putenv('PHP_INI=["error_reporting"=>true]');

$configs = Cekurte\Environment\Environment::get('PHP_INI');

foreach ($configs as $key => $value) {
    echo $key . '=' . $value;
}

As you can see this configuration is an array, so when you get this environment variable with this library you should have an array. Why don't you used it?

Your suggestion is interesting.

[João Paulo Cercal]

Hey guy, I created a draft of your suggestion with a piece of sugar =)

So, you can get all data and filter them by environment variable name or value.

<?php

$configs = Cekurte\Environment\Environment::getAll([
    new Cekurte\Environment\Filter\KeyRegexFilter('/PROCESSOR/'),
    new Cekurte\Environment\Filter\ValueRegexFilter('/6/'),
]);

You can see all changes here:
https://github.com/jpcercal/environment/tree/feature/issue-9

[Tim Kelty]

Yeah, looks great! 😸

In that example, the results would be filtered by everything in the passed array, right? So you would only get the PROCESSOR=6 var?

[João Paulo Cercal]

Yeap!

Considering that exists only one environment variable with the name PROCESSOR and with the value six.

[Tim Kelty]

Love it!

[João Paulo Cercal]

@timkelty I created a new release with this feature 6be36b0. Thanks a lot!